| pqo | PhreeqcI Data |
| pqr | PyMOL PQR Data |
| pqs | PQS Input File |
| pqt | Mail.dat Package Quantity File |
| pqw | Corel Presentations Slideshow Runtime |
| pqx | Power Quest Drive Image Index Data |
| pqz | QuaSZ Style Palette |
| pr | Erosion 3D Precipitation Parameters Data |
| pr0 | CheckMark Payroll Company Data |
| pr1 | CheckMark Payroll Employees Data |
| pr1 | Packrat 4.0 Data |
| pr2 | CheckMark Payroll Employee Checks Data |
| pr2 | Proteus Session Data |
| pr3 | CheckMark Payroll Employer Payees Data |
| pr4 | CheckMark Payroll Employer Checks Data |
| pr5 | CheckMark Payroll Distributions Data |
| prb | xyAlgebra Probabilities |
| prd | MAP Device Document |
| pre | Altair FEKO PREFEKO Input Data |
| pre | Carlson 2016 Geologic Model Data |
| pre | Insight II Dynamics Scratch Data |
| pre | Nero WaveEditor Presets Data |
| prefetch | Microsoft Windows Prefetch Data |
| preinst | Debian Package Pre-installation Script |
| prep | AMBER Prep Format File |
| prerm | Debian Package Pre-removal Script |
| pretty | SAM Prettyalign Output |
| preview7 | WindowBlinds Temporary Data |
| previous | Mac OS X Address Book Backup |
| prex | Prex Data |
